Analysis
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max time kernel
150s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 02:32
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe
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Size
42KB
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MD5
8884909fc08a1b94723e63ebbd6f2ad3
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SHA1
ece6ddd4c4947ede1e7370259402e3ce534b6fa1
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SHA256
ad6c0e9b894b822a20759f6cf2aef48886bafdcc665fc302a08c8d9bae698d0d
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SHA512
bfbf72ea73cb83b4f92758b10986d835ac40a1dc57adb0de6040d9b8ed6384244386f2197962ba690ac360778f967798826b37b66489e50fa40f3e6660876b1e
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SSDEEP
768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAqjru:bCDOw9aMDooc+vAqjK
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4624-0-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000a0000000233c0-13.dat CryptoLocker_rule2 behavioral2/memory/4624-16-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3576-26-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3576 lossy.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4624 wrote to memory of 3576 4624 2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe 82 PID 4624 wrote to memory of 3576 4624 2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe 82 PID 4624 wrote to memory of 3576 4624 2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_8884909fc08a1b94723e63ebbd6f2ad3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4624 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:3576
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
42KB
MD5351d1426518a8bf32481a507eb0f11a0
SHA16d6ee9c5a2e85f63056631b26cb1ad37d69fec6f
SHA256dd318392228c245615fb7a76ac8a7e08897b9e829bab55324f2ad5e7e5cf850b
SHA512549a317f8f588098df8a5130b744f17f2768ac0ffd6c8993f2e164b0eab35043f9e51f6129332e338fd2a1847160e8b8f607239b349b7f665ebfd5406f66e6e6